Brief: Britain's M&S raises retail staff pay by 6.4%
March 3 (Reuters) - Marks & Spencer Group PLC MKS.L: M&S: UK RETAIL STAFF PAY TO INCREASE 6.4% FROM APRIL 1, HOURLY PAY RISES TO AT LEAST 13.41 POUNDS M&S: PAY INCREASE WILL COST OVER 70 MILLION POUNDS M&S: OVER 350 MILLION POUNDS INVESTED IN RETAIL STAFF PAY OVER LAST 4 YEARS, RETAIL STAFF PAY UP 34% Further company coverage: MKS.L ((james.davey@thomsonreuters.com))